When running the command sudo apt update I get the following problems that bothers me a lot:

$ sudo apt update

Hit:1 http://repo.mysql.com/apt/ubuntu eoan InRelease    
Hit:2 https://deb.debian.org/debian buster InRelease               
Ign:3 http://ppa.launchpad.net/morphis/anbox-support/ubuntu hirsute InRelease
Hit:4 https://deb.debian.org/debian-security buster/updates InRelease
Hit:5 https://download.sublimetext.com apt/stable/ InRelease       
Ign:6 https://storage.googleapis.com/cros-packages/88 buster InRelease
Err:7 http://ppa.launchpad.net/morphis/anbox-support/ubuntu hirsute Release
  404  Not Found [IP: 80]
Hit:8 https://storage.googleapis.com/cros-packages/88 buster Release
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/morphis/anbox-support/ubuntu hirsute Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

When trying to use sudo apt autoremove I get the following result:

$ sudo apt autoremove
E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?
  • I concur with HappyTux regarding the state of the sources list. As for the dpkg lock, could you update your question to include the output of ps aux | grep -i apt? The solution may be just a couple of clicks.
    – user1091774
    Feb 21, 2021 at 1:19
  • 1
    It doesn't appear that you're using Ubuntu?
    – KGIII
    Feb 21, 2021 at 2:21
  • What's the OS? Hirsuite is in beta (so we don't fully support it here). Mixing repositories from different distros and even versions causes issues like this. I suggest you edit and post the contents of your /etc/apt/sources.list and output of lsb_release -a.
    – Zanna
    Feb 21, 2021 at 8:10
  • I'm using chrome os. Which has ubuntu in only one window if I'm not mistaken. Feb 21, 2021 at 14:59

1 Answer 1


You need to edit your /etc/apt/sources.list and remove all the useless repositories you have in it. You have lines for two different and incompatible Ubuntu releases, Debian buster which is incompatible with both of those and the third party repositories who knows if compatible, I am not going to check. The file is a mess and will never produce a stable system. The third party sources can be in your /etc/apt/sources.d/ directory the location for them third party installed sources. Comment out the lines in those files by putting a # at the start of the lines that do not have one or removing the file completely, then apt update to have it re-read and update the package cache.

  • When opening sources.list, I have only the files: deb deb.debian.org/debian buster main deb deb.debian.org/debian-security buster/updates main Feb 21, 2021 at 14:56
  • Then they are in your /etc/apt/sources.d/ directory the location for third party installed sources. Comment out the lines in those files by putting a # at the start of the lines that do not have one or removing the file completely, the apt update. You want at least the Ubuntu removed as it appears you are supposed to be running Buster from that response. I have edited the response to reflect the third party location.
    – user1179897
    Feb 21, 2021 at 15:04
  • Thanks for the help, I was able to remove the files that were causing the problem, they were exactly in /etc/apt/sources.list.d. Everything is going normally now. Feb 21, 2021 at 15:11
  • Good to read it is solved, in the future only put in lines that are confirmed to be compatible with Buster, this will allow the software to be used with your system.
    – user1179897
    Feb 21, 2021 at 15:14

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